Alert archive / Illinois / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 121, NWS Paducah, KY
NWS Paducah, KY issued this severe thunderstorm warning at May 22, 1998, 6:18 AM CDT for Jefferson County, Illinois. It was in force for 32 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- May 22, 1998, 6:18 AM CDT (11:18 UTC)
- Expired
- May 22, 1998, 6:50 AM CDT
- In force
- 32 min
- Issued by
- NWS Paducah, KY
- Area
- Whole counties
County Jefferson County, IL
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 22, 6:21 AM CDT | Thunderstorm Wind 52 | Dix, IL | Thunderstorm winds downed trees. |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 11.3 hours before the alert went out and 207 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1615 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 19 m²/s²
- 0-3 km storm-relative helicity
- 137 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Paducah, KY wrote its last area forecast discussion before this severe thunderstorm warning went out at May 21, 1:15 PM CDT, 17 hours 3 minutes earlier.
Area forecast discussion, May 21, 1:15 PM CDT, 17 hours 3 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PADUCAH KY 115 PM CDT THU MAY 21 1998 PROBLEM/IRRITANT OF THE DAY IS PLACEMENT OF THUNDERSTORMS THROUGH EVENING HOURS AND RESULATANT EFFECT ON EVERYTHING ELSE. CURRENT COMPLEX MOVING PAST KSTL HEADING SOUTHEAST AROUND 40 MPH AND BUILDING SOUTHWARD. BASED ON ADAP LIFTED INDICIES AND AMOUNT OF INSOLATION SOUTH OF FRONT...THIS COMPLEX SHOULD BUILD INTO SOUTH CENTRAL MISSOURI. IR SAT LOOP SEEMS TO INDICATE THIS MAY BE OCCURRING. STORMS SHOULD BE IMPACTING S IL/SEMO AFTER 3 PM AND SHOULD REACH TO NEAR KPAH BY 430-530 PM. BASE DON AMOUNT OF INSTABILITY AND TIMING OF SYSTEM STORMS COULD TAKE AWHILE TO DECREASE ACROSS W KY. COULD END FAIRLY EARLY ACROSS S IL AND SEMO. WILL SUGGEST LIKELY OR BETTER POPS BASED ON LAST MINUTE RADAR CHECKS PRIOR TO PRESS TIME. SOME DIFFERENCES IN GUIDANCE TEMPS THRU PERIOD WITH FWC THE WARM SET AS USUAL. WILL SUGGEST A BLEND. SDB
The office that day
Everything else NWS Paducah, KY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 22, 6:29 AM CDT | Severe Thunderstorm Warning | PAH | Hamilton, Wayne | 31 min |
| May 21, 7:48 PM CDT | Severe Thunderstorm Warning | PAH | Bollinger | 42 min |
Nearby
Severe Thunderstorm Warnings in Illinois, 1998Every severe thunderstorm warning in 1998
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.